You can add a new file type to the New item section of the Windows 10 Context Menu, but you will have to edit the Windows Registry. Here is how you do it.

Need to use third-party programs to open files on your PC? Here's how to change file associations in Windows 10 and choose which apps open which file types.

The Preview Pane add-on offers a way to view more types of files without having to open them. Learn how to use this helpful tool.

FileTypesMan allows you to view, add, remove edit file extensions and types on Windows 11/10. You can always manually set or change File Associations & Extensions.

Is a file or process being blocked by Defender? You can add a file type or process exclusion to Windows Security via GPEDIT or its Settings.

Windows makes it easy for you to open up these files by setting up default programs for each file type -- images files, for example, will open by default in the Windows 10 Photos app.